The computers made by our company sell best, but several years ago no one could have imagined the role in the markets that they _________.
The most important thing _______ we should pay attention to is the first thing ________ I have said.
_____, the great mother, in order to save her sick child, kept waiting for four hours in the heavy snow.
Was it in 2002 __________ he was still at middle school __________ the boy became expert at computer?
You can’t imagine what difficulty we had home in the snowstorm.
—How many times have you been to China? —In fact, it is the first time I __________ here.